Apparently, GIGABYTE's GeForce GTX 670 WindForce 3X OC graphics card (model: GV-N670OC-2GD) is riddled with stability issues that can only be corrected with a graphics card BIOS update. The stability issues apparently relate to the way the GPU is addressing overclocked Hynix GDDR5 memory chips. The company released a pair of BIOS files, version F4 based on NVIDIA source BIOS 80.04.31.00.58 and version F12 based on NVIDIA source BIOS 80.04.31.00.09. The two were posted recently, but are date-stamped 13-Jul-2012. The two don't change the clock speeds the card ships with: 980 MHz core, 1058 MHz GPU Boost, and 6.00 GHz memory. Graphics card BIOS updating is a trickier process than motherboard BIOS updates, and you need to be really sure what you're doing. Find the BIOS files, and related documentation in the link below.